01
Degrees → radians formula
02
Arc length s = rθ
03
Sector area A = ½ r²θ
04
Sine rule
05
Cosine rule & rearrangements
06
Area of triangle using sine
07
Example: find radius from arc length
08
Concentric arcs: ratio & perimeter
09
Segment perimeter (chord + arc)
10
Concentric arcs with PS ⟂ OR
11
Minor arc length from sector area
12
Concentric circles: find OA & area ratio
13
Segment area from θ and arc length
14
Inscribed sector (perpendicular) — θ, arc, area
15
Tangents P,Q meet at R — shaded area